#define _CRT_SECURE_NO_WARNINGS 1
#include<iostream>
#include<set>
#include<unordered_set>

using namespace std;

void test_set1()
{
	unordered_set<int> s = { 3,1,6,7,8,2,1,1,1 };
	unordered_set<int>::iterator it = s.begin();
	while (it != s.end())
	{
		cout << *it << "";
		++it;
	}
	cout << endl;
}



int main()
{
	test_set1();// 316782
	return 0;
}